[jvm-packages] Set GPU device id explicitly at very beginning for training #11939
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Hi @trivialfis, Please help review it. |
trivialfis
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Jan 20, 2026
| * Method: CudaSetDevice | ||
| * Signature: (I)I | ||
| */ | ||
| JNIEXPORT jint JNICALL Java_ml_dmlc_xgboost4j_java_XGBoostJNI_CudaSetDevice(JNIEnv *, jclass, |
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Please consolidate this function into xgboost4j.cpp, then use the SetDevice function from cuda_rt_utils.h file, which can handle CUDA build and CPU-only build
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Ref to: #11884
This PR adds JNI functions to manage CUDA device selection for XGBoost Spark, and and allows Spark executors to explicitly set and acquire GPU devices before XGBoost training, relying on Spark's resource scheduler to prevent GPU conflicts between executors.